论文标题
FSRQ S5 1044+71的γ射线发射中可能的三年准周期振荡
A Possible 3-Year Quasi-Periodic Oscillation in γ-Ray Emission from the FSRQ S5 1044+71
论文作者
论文摘要
变异性是费米大麻片的典型观察特征，有时会显示出准周期振荡（QPO）。 In this work, we obtained 5-day binned light curves (with a time coverage of $\sim$ 12.9 yr) for S5 1044+71 based on Fermi LAT data, adopted five different methods: Date-compensated Discrete Fourier Transform (DCDFT), Jurkevich (JV), Lomb-Scargle Periodogram (LSP), a Fortran 90 program (REDFIT) and the Weighted Wavelet Z-Transform（wwz）至$γ$ ray灯曲线，并在$ \sim3.6σ$的显着性水平下发现了3.06 $ \ pm $ 0.43岁的QPO。包括积聚模型和双射流模型在内的二进制黑洞模型用于解释此准周期性变异性。我们还估计了两个喷气组件的多普勒因子和明显的速度。我们推测，这种$γ$ ray准周期调制表明S5 1044+71中存在二进制超级黑洞。
Variability is a typical observation feature of Fermi blazars, sometimes it shows quasi-periodic oscillation (QPO). In this work, we obtained 5-day binned light curves (with a time coverage of $\sim$ 12.9 yr) for S5 1044+71 based on Fermi LAT data, adopted five different methods: Date-compensated Discrete Fourier Transform (DCDFT), Jurkevich (JV), Lomb-Scargle Periodogram (LSP), a Fortran 90 program (REDFIT) and the Weighted Wavelet Z-transform (WWZ) to the $γ$-ray light curve, and found a possible QPO of 3.06 $\pm$ 0.43 yr at the significance level of $\sim3.6σ$. A binary black hole model including accretion model and dual-jets model is used to explain this quasi-periodic variability. We also estimated the Doppler factors and the apparent velocity for the two jet components. We speculate that this $γ$-ray quasi-periodic modulation suggest the presence of a binary supermassive black hole in S5 1044+71.
